Well its not any different when you adjust string action: you take out the springs and let the bridge sit completely loose. You just have to take out the completely detached bridge from the cavity. But I understand if someone likes a "cleaner" looking method - I'm just too lazy to find the "right sized block to use...And I bet that you cannot use the same block for all guitars as the cavity size and/or the sus block size will differ, calling for a differently sized block. Or can you?
How do you adjust the action with the strings off? The strings have to stay onboard and strung to their regular tension otherwise there is no way to determine if you have reached the proper action.
Dude...do you even play guitar or just hang around?
P.S. Yes you can use the same block for nearly all guitars: A nine-volt battery should do it.
I use a small metal plate which is padded on the bottom. It is more like a ramp, really, and it fits between the saddle length adjustment screws and the body, keeping the bridge plate parallel to the body when you change strings.

I have one of these that I use when changing strings. Can't recall when I got it but it was probably 25 or so years ago. Definitely after I purchased my Baretta.
Changing the strings isn't too bad for me. I don't playing a Floyd equipped guitar as my main one anyway. Though it is dive-only, I find this tool very helpful with getting to the string lock allen screws on the back. Once they are changed, remove the block, stretch them out, tune up, stretch, tune. Rinse and repeat until they are stable, lock the nut, fine tune if necessary.
https://www.shredneckstore.com/SearchResults.asp?Cat=46
The first 3 that come to my mind when I remember seeing Floyds are Eddie Van Halen, Neal Schon, and Brad Gillis. I believe they were the very first to use the system. Might be wrong but I seem to remember reading about those 3 getting the first ones.

I always preferred Kahlers.I fell in love with my Floyd once I put the Trem Block on it, until then I was wondering why everyone was so in love with them.